|Chronology||Current Month||Current Thread||Current Date|
|[Year List] [Month List (current year)]||[Date Index] [Thread Index]||[Thread Prev] [Thread Next]||[Date Prev] [Date Next]|
Imagine a glass micro-pipette whose inner diameter is two/snip/
microns; it is 9 cm long. At both ends it progressively
(over a distance of 3.5 cm) becomes a pipette whose inner
diameter is 50 microns. In other words a glass tube with
a very narrow central region.
An extremely short (tens of femto-seconds ?), and very
intense (3.9 nJ), pulse of laser light enters the tube as
highly monochromatic (about 840 nm). And what comes
out? Photons whose wavelengths have a continuous
distribution from about 400 nm to about 1500 nm.